Color of OLED technology1

Display is full color inspection display is an important symbol of competitive in the market, so many full-color technique is also applied to OLED displays, according to the type of panel usually has the following three kinds: RGB pixel independent shine light color conversion ( 颜色转换) And the color filter film ( 颜色过滤器) 。 A, RGB pixel independent light-emitting

using luminescent material luminescence is used the most color mode. It is the use of precision metal shadow mask and CCD pixel registration technology, first of all the preparation of red, green, blue three colors glow center, and then adjust the blending ratio of 3 kinds of color combination, produce true color, three color OLED elements independent light-emitting constitute a pixel. The technology is the key to improve color purity and luminous efficiency of luminescence materials, metal shadow mask etching technology at the same time is also important. At present, the small organic molecules luminescent material AlQ3 is as good as green light small material, its green light color purity, luminous efficiency and stability is very good. But the best red light emitting OLED small molecule materials only 31 mw luminous efficiency, life 10000 hours, blue light emitting the development of small molecule materials is very slow and difficult. The biggest bottleneck to the organic small molecules luminescent material is red and blue material purity, efficiency and life span. But the luminescent materials doped by subject, has got the color purity, good luminous efficiency and stability are blue and red light.

polymer luminescent material has the advantage that can be chemically modified to adjust its luminescent wavelength, has been obtained from blue to green to red to cover the entire range of visible light all sorts of color, but the life is only about one over ten of the small molecule luminescence materials, so the high polymer, the luminous efficiency and life of luminescent material remains to be improved. Constantly develop excellent luminescent material should be material development workers a difficult and long-term task.

as the OLED display color, high resolution and large area, metal shadow mask etching technology directly affect the quality of the picture display board, so the metal shadow mask graphics dimensional accuracy and positioning accuracy more stringent requirements are put forward. 2, light color into light color transformation, it is combined with blue OLED light conversion film array first preparation hair blue OLED devices, then use its blu-ray excitation light color conversion materials get red light and green light, in order to gain full color. The technology is the key to improve the light color conversion material color purity and efficiency. This technique does not need to metal shadow mask alignment technology, need to evaporation blue OLED elements, is the future large size full color OLED display potential full color one of technology. But its drawback is light color conversion material easy to absorb the blue light in the environment, cause the loss of image contrast, at the same time, the problem of optical image quality caused by lower. Now, the technology of Japan idemitsu kosan company has produce 10 inch OLED displays. Three, color filter film

this technology is to use the white light OLED color filter film, the first preparation of white OLED devices, and then through the color filter film get three primary colors, and combination of the three primary color display. The technology is the key to obtain high efficiency and high purity of white light. Its making process does not need metal shadow mask alignment technology, can use mature LCD LCD color filter membrane production technology. So is the large size full color OLED display one of technology has the potential to full color, but adopting this technology caused loss of light through the color filter film is as high as two-thirds. The Japanese TDK company and American Kodak company USES this method to make the OLED display. RGB pixel independent shine light color conversion and color filter membrane three manufacturing OLED display full color technology, each have advantages and disadvantages. Can be determined according to the process structure and organic material.

China lighting network